At least 31 people were killed and over 100 others were injured Thursday when a fire broke out at a hospital in southwestern Saudi Arabia.

The cause of the blaze at the Jazan General Hospital, which broke out around the hospital's intensive care, maternity and neonatal care wards, remains unknown, Saudi Civil Defense spokesman Maj. Yahya bin Abdullah al-Qahtani said.

The wounded were being transferred to other hospitals in the area. There was no immediate breakdown of the victims or further details available.

Jazan is located in the southwestern corner of Saudi Arabia, just north of the border with Yemen, and has a population of just over 100,000 people.

Saudi Arabia has suffered a number of large-scale accidents this year, including a crane collapse that killed 111 and a stampede that killed at least 2,411 during the hajj pilgrimage in September, according to an Associated Press count.

The AP figure, which is three times higher than the official toll, establishes the Sept. 24 stampede at Mina as the deadliest incident in the history of the annual pilgrimage. It is based on state media reports and officials' comments from 36 of the over 180 countries that sent citizens to the hajj. Hundreds remain missing.

The kingdom has also been struggling with multiple pressures. It is dealing with a war in neighboring Yemen, Russia's entry into the Syrian conflict and low oil prices that are straining its budget.